Thanks for the replies
-Only damage I could find was a slightly bent disc could have been like that before right enough that's been replaced now though, and I'm using a home made syringe and tubing job!
- not sure will check when I get a chance,
- cheers will give that a shot. Probably worth doing anyways even if it's not the problem.
- Thanks will give that a bash as well,
Cheers for the help so far, will let you know how I get on.
Alex.